Gideon Crew races to destroy an extraterrestrial organism that has embedded itself in the sea bed and threatens the very existence of humankind. Gideon Crew faces his most dangerous assignment yet. Five years ago, a mission to recover a gigantic meteorite – the largest ever discovered – ended in disaster. The tragedy revealed that the meteorite was, in fact, a complex organism from the deep reaches of space. Now, the alien organism has implanted itself in the sea bed – and it is growing. If it is not destroyed, the planet is doomed. But as Gideon and his colleagues soon discover, the 'meteorite' has a mind of its own – and it has no intention of going quietly...